barack obama and hillary clinton were once political rivals. >> this morning as secretary of state clinton gets ready to leave the white house, she may be stepping down with what sounds like a presidential endorsement. it's monday, january 28th. >> from abc news, this is "world news now." >> good morning. i'm sunny hostin. >> happy monday, everybody. i'm rob nelson. we'll get to our top political headlines in just a second, including a bipartisan deal on one of the president's pet projects. could be some major headway being made on immigration reform, which was a big focus of president obama's inaugural address. kind of a failed promise from his first term, but gaining steam in the second. >>> also this morning, tragedy in south america. the nightclub fire that has stunned the world. what investigators are learning this morning as brazil gets ready to bury more than 200 victims and still counting. >> terrible tragedy there. >>> and the nasty winter weather system that couldn't come at a worse time. snow and ice hit the midwest over the weekend, and it could spread misery to millions of peo